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Z81.8 ICD-10-CM Code: Family history of other mental and behavioral disorders

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Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
1 inclusion term · 1 code-also instruction

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too, and is marked with where it comes from.

Code alsofrom Z77-Z99May be needed with this code
  • any follow-up examination (Z08-Z09)
IncludesWhat this code covers
  • Conditions classifiable elsewhere in F01-F99

Where it sits Source: CMS/NCHS

Under:Chapter 21: Factors Influencing Health Status and Contact with Health ServicesZ77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health statusZ81 Family history of mental and behavioral disorders

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Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 795 — NORMAL NEWBORN (MDC 15)
  • MS-DRG 951 — OTHER FACTORS INFLUENCING HEALTH STATUS (MDC 23)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for Z81.8 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on Z81.8 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Conditions classifiable elsewhere in F01-F99

Code Also

Additional codes that may be required to fully describe the encounter.

  • any follow-up examination (Z08-Z09)

Source: inherited from Z77-Z99

Coder workflow for Z81.8

MedCoder structured workflow — derived from this code’s own official record

Before you code Z81.8

  1. Confirm the reason for the encounter this Z code records: a personal or family history — a condition no longer present or present in a relative — never a current condition. Check whether the code may be reported as first-listed or principal — some Z codes are limited to one position — and do not report a history or status code for a condition documented as current. Z code categories and their reporting positions (Guidelines I.C.21.c.4, I.C.21.c.15).

    Guide: History codes (Z codes) →

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The reason for the encounter
Whether the code records the encounter’s purpose, a status, or a history — and whether it may be first-listed (Guidelines I.C.21.c).

Official instructions as workflow

  • Code Also — related condition(1 note)

    Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

    See the official tabular notes · Guidelines I.A.17

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Family history of other mental and behavioral disorders is a billable ICD-10-CM diagnosis code (Z81.8).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 21: Factors influencing health status and contact with health services (Z00-Z99)

The history Z code categories are: Z80 Family history of primary malignant neoplasm Z81 Family history of mental and behavioral disorders Z82 Family history of certain disabilities and chronic diseases (leading to disablement) Z83 Family history of other specific disorders Z84 Family history of other conditions Z85 Personal history of malignant neoplasm Z86 Personal history of certain other diseases Z87 Personal history of other diseases and conditions Z91.4- Personal history of psychological trauma, not elsewhere classified Z91.5- Personal history of self- harm Z91.81 History of falling Z91.82 Personal history of military deployment Z91.85 Personal history of military service Z92 Personal history of medical treatment Except: Z92.0, Personal history of contraception Except: Z92.82, Status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to a current facility

Verify Before Coding

  • Principal-diagnosis restriction. The Medicare Code Editor lists this code as unacceptable as a principal diagnosis: it describes a circumstance influencing health status rather than a current illness or injury being treated. It is valid as a secondary diagnosis.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name Z81.8 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Use Additional Code instruction: Z15 — Genetic susceptibility to disease (via Z81.-).

These codes instruct coders to additionally report this code when it applies.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 2 MS-DRGs: DRG 795 (MDC 15), DRG 951 (MDC 23).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):FAC028 — Family history of disease (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Principal diagnosis restriction (Medicare Code Editor)

Not acceptable as a principal diagnosis on an inpatient claim.

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Family history of disease).

Z80.59 — Family history of malignant neoplasm of other urinary tract organ, Z80.6 — Family history of leukemia, Z80.7 — Family history of other malignant neoplasms of lymphoid, hematopoietic and related tissues, Z80.8 — Family history of malignant neoplasm of other organs or systems, Z80.9 — Family history of malignant neoplasm, unspecified, Z81.0 — Family history of intellectual disabilities, Z81.1 — Family history of alcohol abuse and dependence, Z81.2 — Family history of tobacco abuse and dependence, Z81.3 — Family history of other psychoactive substance abuse and dependence, Z81.4 — Family history of other substance abuse and dependence, Z82.0 — Family history of epilepsy and other diseases of the nervous system, Z82.1 — Family history of blindness and visual loss, Z82.2 — Family history of deafness and hearing loss, Z82.3 — Family history of stroke, Z82.41 — Family history of sudden cardiac death, Z82.49 — Family history of ischemic heart disease and other diseases of the circulatory system, Z82.5 — Family history of asthma and other chronic lower respiratory diseases, Z82.61 — Family history of arthritis, Z82.62 — Family history of osteoporosis, Z82.69 — Family history of other diseases of the musculoskeletal system and connective tissue, +44 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “History”; these codes share that main term but sit in a different category of the Tabular List.

Z80.43 — Family history of malignant neoplasm of testis (family, malignant neoplasm NOS, testis), Z80.44 — Family history of malignant neoplasm of fallopian tube(s) (family, malignant neoplasm NOS, fallopian tube), Z80.49 — Family history of malignant neoplasm of other genital organs (family, malignant neoplasm NOS, genital organ), Z80.51 — Family history of malignant neoplasm of kidney (family, malignant neoplasm NOS, kidney), Z80.52 — Family history of malignant neoplasm of bladder (family, malignant neoplasm NOS, bladder), Z80.59 — Family history of malignant neoplasm of other urinary tract organ (family, malignant neoplasm NOS, urinary organ or tract), Z80.6 — Family history of leukemia (family, leukemia), Z80.7 — Family history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (family, malignant neoplasm NOS, lymphatic NEC), Z80.8 — Family history of malignant neoplasm of other organs or systems (family, malignant neoplasm NOS, specified site NEC), Z80.9 — Family history of malignant neoplasm, unspecified (family, malignant neoplasm NOS), Z82.0 — Family history of epilepsy and other diseases of the nervous system (family, epilepsy), Z82.1 — Family history of blindness and visual loss (family, blindness), Z82.2 — Family history of deafness and hearing loss (family, deafness), Z82.3 — Family history of stroke (family, stroke), Z82.41 — Family history of sudden cardiac death (family, cardiac death), Z82.49 — Family history of ischemic heart disease and other diseases of the circulatory system (family, disease or disorder, ischemic heart), Z82.5 — Family history of asthma and other chronic lower respiratory diseases (family, asthma), Z82.61 — Family history of arthritis (family, arthritis), Z82.62 — Family history of osteoporosis (family, osteoporosis), Z82.69 — Family history of other diseases of the musculoskeletal system and connective tissue (family, disease or disorder, musculoskeletal NEC), +264 more

Contextual Map

Every relationship of Z81.8 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run Z81.8 with this related code in Claim Check

Hierarchy

Referenced by Use Additional Code instructions

  • Z15 — Genetic susceptibility to disease[Use Additional Code](via Z81.-): “code, if applicable, for any associated family history of the disease (Z80-Z84)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

Index entries (12)

  • History, family (of), disease or disorder (of), behavioral NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), disease or disorder (of), mental NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), disease or disorder (of), psychiatric NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), mental, disorder NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), psychiatric disorder[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), self-harmful behavior[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • History, family (of), violence, violent behavior[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Parasuicide (attempt), history of (personal), in family[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • and 4 more

Nearest codes

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Indexed Clinical Terms (12)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2027), quoted by section Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "Z81.8 — Family history of other mental and behavioral disorders." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/z81.8-family-history-of-other-mental-and-behavioral-disorders

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Family history of other mental and behavioral disorders

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Z81.8 in its code family, with their registry titles.

View all codes in the Z81 family